Yes there is a way to show the actual number you have in your inventory. I did it for my clearance items as the quantities are very limited and I want people to consider buying all of it instead of just leaving me with a few (like if they were originally thinking they wanted 25 invites, but saw that the quantity available was 30...they might just say to hell with it and buy all 30).
Here's a link to one of my clearance items.
http://www.invitingwaysonline.com/St...K_p_31-93.html Look at the top right area next to the main product image...you'll see "Availability - 34) or something like that. I can't remember if i did this myself or had to get the help of support, but I'm not a pro at any of this so I got a lot of help from support on many things. Maybe if you look at my source code you can see how I did it and then do the same for yourself.
HOpe that helped a bit.